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Outreach.Buzz - Outreach.Buzz helps people connect with bloggers and influencers in order to promote their content, increase their traffic, and reach the highest rankings in search engines.

GetNotify - GetNotify is a free email tracking software solution.

Vipon - Vipon allows shoppers worldwide to access amazing deals and coupons and save their precious money.

Mailtrack.io - The best email tracking solution I've found. Free

BluePlanner - Sales Planning, Trade Promotion, and Analytics Software for Consumer Goods Manufacturers